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A227750
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Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having determinant equal to one
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1
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24, 409, 6002, 90881, 1378923, 20935625, 317839952, 4824746883, 73241810146, 1111840502498, 16878162167610, 256217101254446, 3889475171157074, 59043746368678100, 896307041512584467, 13606289568286192979
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
..1..1..0..0..0....1..0..1..0..0....1..0..1..0..0....1..0..0..1..0
..0..0..0..0..0....1..1..0..0..0....0..0..0..0..1....0..0..0..1..0
..0..1..0..1..1....0..0..0..1..0....0..1..0..0..0....1..0..0..0..0
..1..0..0..0..1....1..0..0..1..0....1..0..0..0..1....0..0..0..0..0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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